(19)
(11) EP 1 162 801 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
12.11.2003 Bulletin 2003/46

(43) Date of publication A2:
12.12.2001 Bulletin 2001/50

(21) Application number: 01107538.9

(22) Date of filing: 27.03.2001
(51) International Patent Classification (IPC)7: H04L 12/64, H04M 7/00, H04L 29/06
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 10.06.2000 US 591416

(71) Applicant: Nortel Networks Limited
St. Laurent, Quebec H4S 2A9 (CA)

(72) Inventor:
  • Zeiss, Joachim
    1050 Wien (AT)

(74) Representative: Wiebusch, Manfred 
TER MEER STEINMEISTER & PARTNER GbR, Patentanwälte, Artur-Ladebeck-Strasse 51
33617 Bielefeld
33617 Bielefeld (DE)

   


(54) Digital telecommunication network


(57) A digital telecommunication network, comprising:
  • a number of user terminals (14, 16, 18, 20) each having a user interface which enables the user to call other user terminals by dialling telephone numbers assigned thereto and to call-up additional network functions, and
  • a switch system (12) establishing call connections between the user terminals and providing the additional network functions,
   characterized in that the user terminals (14, 16, 18, 20) are formed by multi-purpose computers which emulate the functions and the user interface of a telephone set, and
   the switch system is formed by a central unit (12) directly connected to the user terminals through a network (10) on which the user terminals communicate with each other and with the central unit in accordance with a transmission protocol based on addressed data packets.






Search report